Khi hấp thu hết V lít CO2 (đktc) vào 200 ml dung dịch Ba(OH)2 0,25M thu được 3x gam kết tủa. Nếu cho 2V lít CO2 (đktc) vào 200 ml dung dịch Ba(OH)2 0,25M thì thu được 4x gam kết tủa. Tính V và x? giúp em vs ạ hứa vote 5s ạ

Em sẽ nói gì trong tình huống sau 6. What do you say when you want to invite your friend home for dinner? - "..........." 7. What do you say when you want to borrow your friend's ruler? - "........................" 8. What do you say when you want to know your friend's phone number? - "............" 9. What do you say when you want to help someone? - "..........................................." 10. What do you say when you want to know the distance between Ha Noi and Da Nang? - "......................................................................................................................."

V. Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. Question 1. I didn’t know that you were at home. I didn’t drop in. A. Not knowing that you were at home, but I still dropped in. B. I didn’t know you were at home although I didn’t drop in. C. Not knowing that you were at home, I didn’t drop in. D. If I knew that you were at home, I would drop in. Question 2. The man wanted to get some fresh air in the room. He opened the window. A. The man opened the window in order to get some fresh air in the room. B. The man wanted to get some fresh air in the room because he opened the window. C. Having opened the window, the room could get some fresh air. D. The man got some fresh air in the room, even though he opened the window. Question 3. Mr. Smith is very interested in our plan. I spoke to him on the phone last night. A. Mr. Smith, to whom I spoke on the phone last night, is very interested in our plan. B. Mr. Smith, who is very interested in our plan, I spoke to on the phone last night. C. Mr. Smith, who I spoke on the phone last night, is very interested in our plan. D. Mr. Smith is very interested in our plan to whom I spoke on the phone last night. Question 4. Mike graduated with a good degree. However, he joined the ranks of the unemployed. A. If Mike graduated with a good degree, he would join the ranks of the unemployed. B. That Mike graduated with a good degree helped him join the ranks of the unemployed. C. Mike joined the ranks of the unemployed because he graduated with a good degree. D. Although Mike graduated with a good degree, he joined the ranks of the unemployed.

Cho các tập hợp : `A = (1;3)` `B = (m ; 2m + 1)` `(m>-1)` Có bao nhiêu giá trị `m` nguyên để `A ⊂ B`

X-2/3=9/(x-2)^2 3/1.4+3/4.7+....+3/(3x+1)(3x+4)=2/7 Giúp mình vs. Mình cần gấp hứa có 5s và trl hay nhất ạ

Khi cho V lít CO2 (đktc) vào dung dịch chứa 0,05 mol Ba(OH)2 thu được 4x gam kết tủa. Nếu cho 2V lít CO2 (đktc) vào dung dịch chứa 0,05 mol Ba(OH)2 thì thu được 2x gam kết tủa. Tính V và x? giúp mk với mk cần gấp

helppppp 1. What do you say when you want to know the way to the post office?- "................" 2. What do you say when you want to go out? - "........................................................" 3. What do you say when you want to know the price of a book? - ".........................." 4. What do you say when you want to know the time now? - "..................................." 5. What do you say when you want to know the weather today? - "............................"

lạy ông đi qua lạy bà đi lại vẽ cho con/đề bài: vẽ cái nịt.

V. Mark the letter A, B,C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions Question 1. Tom’s jokes are inappropriate but we have to put up with it just because he’s the boss. A. inappropriate B. It C. Because D. the Question 2. The Oxford Dictionary is well known for including many different meanings of words and to give real examples. A. The B. well known C. meanings D. to give Question 3. All the candidates for the scholarship will be equally treated regarding of their sex, age, or nationality. A. candidates B. Scholarship C. Regarding D. nationality Question 4. Weather and geographical conditions may determine the type of transportation using in a region. A. Weather B. Geographical C. the type of D. using in Question 5. Commercial airliners do not fly in the vicinity of volcanic eruptions because even a small amount of volcanic ash can damage its engines.

III. Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. Question 1. School uniform is compulsory in most of Vietnamese school. A. depended B. optional C. obligatory D. required Question 2. Names of people in the book were changed to preserve anonymity. A. cover B. conserve C. presume D. reveal Question 3. A large city such as Chicago would be called an urban area. A. metropolitan B. rustic C. suburban D. sophisticated Question 4. We arrived home safe and sound. A. healthy B. unsound C. insound D. dissound. Question 5. He revealed his intentions of leaving the company to the manager during the office dinner party. A. disclosed B. concealed C. misled D. influenced Question 6. Slang can be defined as a set of lexical, grammatical, and phonological regularities used in informal speech. A. informative B. official C. situational D. casual Question 7. Adverse weather conditions made it difficult to play the game. A. favorable B. bad C. comfortable D. severe Question 8. The Red Cross is an international humanitarian agency dedicated to reducing the sufferings of wounded soldiers, civilians and prisoners of war. A. happiness B. loss C. sadness D. pain and sorrow Question 9. They are launching a campaign to promote awareness of environmental issues. A. encourage B. publicize C. hinder D. strengthen Question 10. We have to employ extra staff to deal with the increased workload. A. approach B. dismiss C. interview D. meet